<template>
  <div>
      <!-- 面包屑导航区域 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
          <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
          <el-breadcrumb-item>数据统计</el-breadcrumb-item>
          <el-breadcrumb-item>数据报表</el-breadcrumb-item>
      </el-breadcrumb>
      <!-- 卡片区域 -->
      <el-card>
          <!-- 2为echarts准备一个具备大小（宽度）的Dom -->
          <div id="mian" style="width:750px;height:400px;" ref="chart"></div>
      </el-card>
  </div>
</template>

<script>
//1 导入echart
import echarts from 'echarts'
import _ from 'lodash'

export default {
    data(){
        return {
            // 需要合并的数据
            options: {
                title: {
                text: '用户来源'
                },
                tooltip: {
                trigger: 'axis',
                axisPointer: {
                    type: 'cross',
                    label: {
                    backgroundColor: '#E9EEF3'
                    }
                }
                },
                grid: {
                left: '3%',
                right: '4%',
                bottom: '3%',
                containLabel: true
                },
                xAxis: [
                {
                    boundaryGap: false
                }
                ],
                yAxis: [
                {
                    type: 'value'
                }
                ]
            }

        }
    },
    created(){
        

    },
    // 此时页面上的元素已经被渲染完毕
    async mounted(){
        //3 基于准备好的dom，初始化echarts实例
        // var myChart = echarts.init(document.getElementById('main'))
        var bar_dv = this.$refs.chart
        if(bar_dv){
            var myChart = echarts.init(bar_dv)
        }

        const {data:res} = await this.$http.get('reports/type/1')
        if(res.meta.status !== 200){
            return this.$message.error('获取折线图数据失败');
        }
        // 4 准备数据和配置项
        const result = _.merge(res.data,this.options)
       
    //    5 展示数据
    myChart.setOption(result)
    },
    methods:{

    }

}
</script>

<style lang="less" scoped>

</style>